Dynamic range extender apparatus, system, and method for digital image receiver system
US6252536A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1999 |
| Grant date | Jun 26, 2001 |
| Priority date | — |
| Expiry date | Mar 31, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A dynamic range enhancement system (DRES) receives input signals from an imager device connected to a correlated double sampling (CDS) circuit for receiving the video signal from the CCD imaging device. The dynamic range enhancement system includes a variable gain amplifier (VGA), and a limited bit-width analog-to-digital converter (ADC) which digitizes the analog signal received from the VGA. The output of the ADC is provided to an initial bit range position of a wider bit-width shifter connected to the output of the ADC. The DRES system includes a 2-bit ADC for extending the dynamic range of the imager device, which enhances the dynamic range of a 10 bit ADC to 13 bits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.